package netty.tcpbug.client;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;

import java.nio.charset.StandardCharsets;
import java.util.logging.Logger;

/**
 * @author Huhailong
 * @Description
 * @Date 2021/4/12.
 */
public class TimeClientHandler extends ChannelInboundHandlerAdapter {

    private static final Logger logger = Logger.getLogger(TimeClientHandler.class.getName());
    private byte[] req;
    private int counter;

    public TimeClientHandler() {
        req = ("QUERY CURRENT TIME"+System.getProperty("line.separator")).getBytes();
    }

    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception {
        ByteBuf buf = null;
        for(int i=0; i<100; i++){
            buf = Unpooled.buffer(req.length);
            buf.writeBytes(req);
            ctx.writeAndFlush(buf);
        }
    }

    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
//        ByteBuf buf = (ByteBuf)msg;
//        byte[]req = new byte[buf.readableBytes()];
//        buf.readBytes(req);
//        String body = new String(req, StandardCharsets.UTF_8);
        String body = (String) msg;
        System.out.println("Now is : "+body+"; counter is : "+(++counter));
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        logger.warning("Unexpected exception from downstream : "+cause.getMessage());
        ctx.close();
    }
}
